Know Your ProfitBefore You List

Accurate fee calculators for eBay, Etsy, Mercari, Depop, and Poshmark. Category-specific rates, sales tax accuracy, and a reverse calculator — all free.

eBay Fee Calculator →All calculators
Verified fee ratesSales tax-accurateReverse calculator includedNo signup

Choose your platform

All calculators are free and updated regularly.

eBay

Final value fees, category rates & promoted listings

Calculate →

Etsy

Listing fee, transaction fee & payment processing

Calculate →

Mercari

10% selling fee plus payment processing

Calculate →

Depop

10% Depop fee plus payment processing

Calculate →

Poshmark

$2.95 flat or 20% for sales over $15

Calculate →

Amazon FBA

Referral fees, FBA fulfillment & storage costs

Coming soon

Built for accuracy, not approximation

Most fee calculators use a flat percentage. Your actual fees don't work that way.

Sales tax-accurate

eBay charges final value fees on the full buyer payment — including sales tax. Most calculators miss this. We don't.

Multi-platform in one place

One tool covers eBay, Etsy, Mercari, Depop, and Poshmark. Compare platforms side-by-side before you list.

Verified and maintained

Fee structures change without warning. We verify rates every quarter and show the last verification date on every page.

Coming soon — FeeFox Pro

The calculator is step one.
The tracker is where you scale.

Every reseller starts with a spreadsheet. Most never move past it. FeeFox Pro replaces the spreadsheet — with real profit tracking, automatic fee math, and insights across all your platforms.

  • Log every item you buy and sell
  • Fees calculated automatically — same engine as the free calculators
  • Real profit by platform, category, and month
  • Tax-ready CSV export for Schedule C
  • AI pattern insights across your own sales data
Learn more →$19/month · 14-day free trial
Profit Dashboard — This Month
eBay · 23 sales
31% margin+$847.50
Etsy · 11 sales
41% margin+$412.80
Depop · 8 sales
38% margin+$203.20
Mercari · 5 sales
28% margin+$94.00
Net profit+$1,557.50
Avg margin34.2%
Total fees paid$489.30
AI insight: Your Etsy margin (41%) is nearly 2× your eBay margin (23%). Shifting inventory could add ~$300/month in profit at current volume.